<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<center>
    <form action="{url:/exam/login_do}" method="post">
        用户名: <input type="text" name="name" id="name"><br>
        密码 : <input type="password" name="pwd" id="pwd"><br>
        <input type="submit"  id="btn" value="登录" >
    </form>
</center>
</body>
</html>